sexton



(No Model.)

W. F. SEXTON, Sr. & W. F. SEXTON Jr.

BALANCING ATTACHMENT FOR DOORS.

No. 245,666. Patented Aug. 16,1881.

N. PETERS. Photo-Lithographer. Waihmgwn, D. c.

UNITED STATES- PATENT "OFFrcE.

WILLIAM F. SEXTON, SR, AND WILLIAM F. SEXTON, JR, OF TORONTO,

ONTARIO,

CANADA.

SPECIFICATION forming part of Letters Patent No. 245,666, dated August 16, 1881.

Application filed May 18, 1881. (No model.)

' the following is a specification.

The object of the invention is to provide for a hinged door a balancing attachment positive in its operation,easily applied, and durablein its construction; and it consists,essentially, of aweight attached by a strap, cord,or chain to a spindle extending from the pivotal point of the hinge, and so arranged that it may be adjusted upon the spindle to secure the effective power of the weight in order to close the door or to hold it open at any desired point.

In the drawings,Figure 1 is a side elevation of a door provided with our improved balancin g attachment arranged to close the door from whichever side it may be opened. Fig. 2 is an end View of Fig. 1, showing the arrangement of our balancing attachment. Fig. 3 is an enlarged plan of our balancing attachment. Fig. 4 is an enlarged end view of the same,and Fig. 5 an enlarged side view. Fig. 6 is a plan of the attachment applied to the door to operate it in one direction. Fig. 7 is a side elevation of Fig. 6. Fig. 8 is an end view, showing the balance-weight connected to the spindle by the interposition of bevel-gears. Fig. 9 is a side view of the latter figure.

While our invention is applicable to all the classes of doors, it has been specially designed for heavy doors made to open on both sides, and which are now commonly supplied with springhinges. These spring-hinges it is known soon weaken and require constant adjustmentto insure their working.

In the drawings like letters indicate corresponding parts in each figure.

A is the door, hinged or pivoted as represented, and provided with a spindle, B, extending from the pivotal point of the door, preferably below thefloor, and resting on a suitable bracket, O, screwed to thejoists. An adjusting setscrew, 0, is applied to the bottom of the spindle B in such a manner that the door may be readily adjusted closer or farther away from the floor, as circumstances may require. A pul- I ley, D, (or, when the attachment is arranged as shown in Figs. 8 and 9, a bevel-spur wheel,) is keyed or otherwise fastened to the spindleB.

When the attachment is arranged as shown in Figs. 1, 2, 3, 4., and 5 an endless strap, E, passing around the pulleyD is supported horizontally by the pulleys F, and in passing over passes around and is attached to the pulley G. On a line with the center of this latter pulley we locate friction-rollers H, between which the strap I passes, as shown. This strap forms part of and is connected to the endless strapE, its other end having attached to it a weight, J. This weight is made sufficiently heavy to counterbalancc the doorA and forceit to turn upon its pivot or hinge.

In order to insure that the effective power of the weight shall always be properly directed, we provide a set-screw, K, passing through a bracket attached to the pulley D, and so arranged that it will clamp the strap E to this pulley. Owing to this set-screw it will be possible to set the door so that the effective power of the weight will be exerted upon the door to keep it closed or open, as the case may be. The point to be observed when securing the door to this strap is that the weight J shall be immediately below and on a line with the center of the pulley G.

With this description of the construction of our attachment and its connection with the door the operation of the weight will be easily understood. As the door is turned upon its hin go the weightis drawn up by the action ofthe endless strap 11}. Immediately the power upon the door is withdrawn the weight J descends, pulling back the endless strap until it regains the position shown in Figs. 2 and 4, carrying with it the door back into its original position. In cases where the door will. be arranged to open only in one direction, instead of an endless strap,E, a single strap, I, is carriedovera pulley, F, the weight J being attached to it, as in the other case, and itis similarly connected to the pulley D by a set-screw.

When it is desired to use thestraps an d pulleys we substitute for the pulley D a bevel-spur wheel,D. Abevel-spur wheehM,supported on a horizontal spindle, N,is set to mesh with the bevel-spur wheel D. The weight J is connectthem extends vertically to a point where it dispensed with and the weight J attached directly to the bevel-spur wheel M, either cast upon it at the point desired or attached by arod.

What We claim as our invention is- 1. In a hinged door, A, having a spindle,B, extending from its pivotal point and adjustably supported on the bracket 0, a pulley, D, fastened to the spindle B, in combination with an endless strap, E, passing around the pulleys D,F, and G and Weighted by the weight J,

substantially as and for the purpose specified.

2. In a hinged door havingaspindle extending from its pivotal point, a pulley fastened to the spindle, in combination with a strap adjustablyfastenedto the pulley on the said spindle, and weighted so as to exert a counterbalancing-power over the hinged door, substantially as and for the purpose specified.

3. A hinged door, A, provided with a spindle extending from its pivotal point, a horizontal wheel fastened to said spindle, and a Vertical wheel connecting with the spindle-wheel, substantially as described, in combination with a weighted strap fastened to said vertical wheel at a point immediately under its center, when in its normal position, as and for the purpose specified.

4. A hinged door, A, provided with a spindle extending from its pivotal point, a horizontal wheel fastened to said spindle, and a vertical wheel connecting withthe spindle-wheel,

substantially as described, in combination with a weighted strap fastened to said vertical wheel at a point immediately under its center, when in its normal position, and passing between suitable guide-pulleys, as and for the purpose specified.

W. F. SEXTON, SR. W. F. SEXTON, JR. Witnesses:

H. H. WARREN, G. W. BALDWIN. 

